Preparation of dichlorotrifluoromethyltoluenes including novel isomers
US4876404A · kind A · utility
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Key dates
| Filing date | Aug 11, 1987 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Aug 11, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Dichlorotrifluoromethyltoluenes useful in producing some medicines and agricultural chemicals are formed with good yields by reacting dichlorotrichloromethyltoluenes with hydrogen fluoride usually at 0.degree.-100.degree. C. under pressure of 3-20 kg/cm.sup.2. Besides known 3,4-dichloro-6-trifluoromethyltoluene and 3,4-dichloro-5-trifluoromethyltoluene, novel isomers are also obtained by this method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.